"Convoland"

I'd like to propose adding the word "convoland" to the dictionary of mathematical and signal processing terms. By analogy to "multiplicand", the definition would be "a signal that is to be convolved with another". 

"Convoland" seems like a useful and somewhat obvious word, but I don't find it when doing a Google Scholar search. I do find the following when searching Google Books: "Semper ordinis aemularor singularis, adeo u! ad ordinem eorum propos�tum habueri! convoland!" Neither Google Translate nor my high school Latin is up to the task of translating "convoland" from Latin - the gerundive form of "convolvere" perhaps? Given the exclamation mark, I can only assume it means something quite exciting.

At any rate, to help this term catch on, please use it as often as possible in everyday conversation. Also, I would like to offer the "Vickers Prize" to the first person to use it in a technical paper.

Thanks in advance,

Earl

Earl Vickers <sfx@sfxmachine.com> wrote:

> I'd like to propose adding the word "convoland" to the dictionary 
> of mathematical and signal processing terms. By analogy to 
> "multiplicand", the definition would be "a signal that is to be 
> convolved with another". 

I might have thought of "convolvand."

I do like the term "significand" in floating point much better
than the way too often used "mantissa." 

Still, it seems that "convoland" sounds too much like a place.
(Maybe a new part of Disneyland in addition to Tommorowland
and Frontierland.)

-- glen

On 12/5/12 8:43 PM, Earl Vickers wrote:
> I'd like to propose adding the word "convoland" to the dictionary of mathematical and signal processing terms. By analogy to "multiplicand", the definition would be "a signal that is to be convolved with another".
>
> "Convoland" seems like a useful and somewhat obvious word, but I don't find it when doing a Google Scholar search. I do find the following when searching Google Books: "Semper ordinis aemularor singularis, adeo u! ad ordinem eorum propos�tum habueri! convoland!" Neither Google Translate nor my high school Latin is up to the task of translating "convoland" from Latin - the gerundive form of "convolvere" perhaps? Given the exclamation mark, I can only assume it means something quite exciting.
>
> At any rate, to help this term catch on, please use it as often as possible in everyday conversation. Also, I would like to offer the "Vickers Prize" to the first person to use it in a technical paper.
>

Earl, you publish on occasion, no?  can't you break that ground?

is somebody giving you shit for introducing a neologism?

i've sorta misused the term "wavelet" when i was told that the proper 
term is "grain" for what i was writing about.  there are some other 
instances (didn't know how "Remez" is pronounced, that's embarrassing).

there's this place Convoland that's a theme park for DSP geeks.

like it has rides like the Spaghetti Code Roller Coaster.

and then there is Transform Sanctum where DSP geeks in one domain get to 
see what life is like in the other.

and there is Quantization Alley.  be careful about the rotating knives 
at the end of the path.

and in the water park, there is the Wavelet Pool.  again be careful 
about getting into the Daubechies Deep.

there are battle theme games like Window Feud where partisans from 
different schools of windowing get to slug it out.  currently the Kaiser 
Killers are ranked on top.  Hamming Huns are doing pretty good.

fun for all at Convoland.

-- 

r b-j                  rbj@audioimagination.com

"Imagination is more important than knowledge."

> fun for all at Convoland.

and don't forget Matlab Madhouse.

On Wednesday, December 5, 2012 7:51:42 PM UTC-7, glen herrmannsfeldt wrote:
> Earl Vickers wrote: > I'd like to propose adding the word "convoland" to the dictionary > of mathematical and signal processing terms. By analogy to > "multiplicand", the definition would be "a signal that is to be > convolved with another". I might have thought of "convolvand." I do like the term "significand" in floating point much better than the way too often used "mantissa." Still, it seems that "convoland" sounds too much like a place. (Maybe a new part of Disneyland in addition to Tommorowland and Frontierland.) -- glen

I may start using that. All too often I find people saying "magnitude," presumably because it looks like mantissa which drives me up the wall.

Bryan

Maybe it should be "convolend", by analogy to "addend". I think at this point a linguist or Latin scholar is needed. "Convolend" may also avoid potential catastrophes in case someone mistakenly tries to convolve a filter with a theme park. 

Am 06.12.12 02:43, schrieb Earl Vickers:
> I'd like to propose adding the word "convoland" to the dictionary of
> mathematical and signal processing terms. By analogy to
> "multiplicand", the definition would be "a signal that is to be
> convolved with another".
>
> "Convoland" seems like a useful and somewhat obvious word, but I
> don't find it when doing a Google Scholar search.
> Neither Google Translate nor my high school Latin is up to the task
> of translating "convoland" from Latin - the gerundive form of
> "convolvere" perhaps?

"Convoland" is not a Latin word. The word "multiplicand" comes from the 
gerundivum of "multiplicare", "multiplicandus", deprived of its ending 
-us. Therefore the -and. Whereas "convolvere" has a different inflexion. 
The gerundivum of convolvere would probably be "convolvendum", but I 
think it was rarely used. Therefore it should be "convolvend", at least 
in my ears.

	Christian

On Wed, 5 Dec 2012 17:43:41 -0800 (PST), Earl Vickers
<sfx@sfxmachine.com> wrote:

>I'd like to propose adding the word "convoland" to the dictionary of mathem=
>atical and signal processing terms. By analogy to "multiplicand", the defin=
>ition would be "a signal that is to be convolved with another".=20
>
>"Convoland" seems like a useful and somewhat obvious word, but I don't find=
> it when doing a Google Scholar search. I do find the following when search=
>ing Google Books: "Semper ordinis aemularor singularis, adeo u! ad ordinem =
>eorum propos=EDtum habueri! convoland!" Neither Google Translate nor my hig=
>h school Latin is up to the task of translating "convoland" from Latin - th=
>e gerundive form of "convolvere" perhaps? Given the exclamation mark, I can=
> only assume it means something quite exciting.
>
>At any rate, to help this term catch on, please use it as often as possible=
> in everyday conversation. Also, I would like to offer the "Vickers Prize" =
>to the first person to use it in a technical paper.
>
>Thanks in advance,
>
>Earl


I think I'm gonna stick with "operand."


Eric Jacobsen
Anchor Hill Communications
http://www.anchorhill.com

On 06/12/2012 19:17, Christian Gollwitzer wrote:
> Am 06.12.12 02:43, schrieb Earl Vickers:
>> I'd like to propose adding the word "convoland" to the dictionary of
>> mathematical and signal processing terms. By analogy to
>> "multiplicand", the definition would be "a signal that is to be
>> convolved with another".
>>
>> "Convoland" seems like a useful and somewhat obvious word, but I
>> don't find it when doing a Google Scholar search.
>> Neither Google Translate nor my high school Latin is up to the task
>> of translating "convoland" from Latin - the gerundive form of
>> "convolvere" perhaps?
>
> "Convoland" is not a Latin word. The word "multiplicand" comes from the
> gerundivum of "multiplicare", "multiplicandus", deprived of its ending
> -us. Therefore the -and. Whereas "convolvere" has a different inflexion.
> The gerundivum of convolvere would probably be "convolvendum", but I think
> it was rarely used. Therefore it should be "convolvend", at least in my ears.
>
>      Christian

I agree that "convolvend" would be the correct form - cf. "addend", 
"dividend", &c., which are likewise derived from the gerundives of Latin 
verbs of the third conjugation.

Examples of its use may be seen in the text snippets on this page -
  http://books.google.co.uk/books?id=r58qAAAAYAAJ&q=%22convolvend%22
and in the code on this -
http://code.google.com/p/agpy/source/browse/trunk/AG_fft_tools/__init__.py?r=534

Patruus

Die Thu Dec 06 2012 15:02:40 GMT-0600 (Central Standard Time) Johannes
Patruus <invalid@invalid.invalid> scripsit:

> On 06/12/2012 19:17, Christian Gollwitzer wrote:
>> Am 06.12.12 02:43, schrieb Earl Vickers:
>>> I'd like to propose adding the word "convoland" to the dictionary of
>>> mathematical and signal processing terms. By analogy to
>>> "multiplicand", the definition would be "a signal that is to be
>>> convolved with another".
>>>
>>> "Convoland" seems like a useful and somewhat obvious word, but I
>>> don't find it when doing a Google Scholar search.
>>> Neither Google Translate nor my high school Latin is up to the task
>>> of translating "convoland" from Latin - the gerundive form of
>>> "convolvere" perhaps?
>>
>> "Convoland" is not a Latin word. The word "multiplicand" comes from the
>> gerundivum of "multiplicare", "multiplicandus", deprived of its ending
>> -us. Therefore the -and. Whereas "convolvere" has a different inflexion.
>> The gerundivum of convolvere would probably be "convolvendum", but I
>> think
>> it was rarely used. Therefore it should be "convolvend", at least in
>> my ears.
>>
>>      Christian
> 
> I agree that "convolvend" would be the correct form - cf. "addend",
> "dividend", &c., which are likewise derived from the gerundives of Latin
> verbs of the third conjugation.
> 
> Examples of its use may be seen in the text snippets on this page -
>  http://books.google.co.uk/books?id=r58qAAAAYAAJ&q=%22convolvend%22
> and in the code on this -
> http://code.google.com/p/agpy/source/browse/trunk/AG_fft_tools/__init__.py?r=534
> 
> 
> Patruus
> 

I can't see the context in the book; in the python code the function def
seems to be short for convolveND (convolve n-dimensional):

"
def convolvend(img, kernel, crop=True, return_fft=False, fftshift=True,
        fft_pad=True, psf_pad=False, ignore_nan=False, quiet=False,
        ignore_zeros=True, min_wt=1e-8, force_ignore_zeros_off=False,
        normalize_kernel=np.sum, debug=False, use_numpy_fft=not has_fftw,
        nthreads=1):
    """
    Convolve an image with a kernel.  Returns a convolved image with shape =
    img.shape.  Assumes image & kernel are centered.
"

Maybe Christian is the inventor of this new word and his name will get
into future (digital) editions of the OED. The concept is brand new to
me. Explained here:

http://en.wikipedia.org/wiki/Convolution

so functions f and g are convolvends.

Eduardus

p.s. I really like the variable name in "force_ignore_zeros_off=False."
If I read it enough times I start to get a glimmer of what it means and
then a bubble bursts and it turns back into an empty sound (flatus
vocis). That last puts all this back on topic ;-)